Manganese residue compound fertilizer and preparation method thereof

A compound fertilizer and manganese slag technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problems of soil compaction, affecting the stability of fertilizer efficiency, easy precipitation of phosphate fertilizers, etc., to improve the soil void structure, control heavy metal pollution, and realize resources. effect of chemical utilization

Active Publication Date: 2012-09-19
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, manganese slag and inorganic salt fertilizers are directly used to prepare compound fertilizers. Calcium sulfate in manganese slag is easy to cause soil compaction, phosphorus fertilizer is easy to precipitate and consolidate in the soil, and nitrogen and potassium fertilizers are easy to lose, thus affecting the stability of fertilizer efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The manganese slag in this example is the leaching residue of manganese carbonate ore from an electrolytic manganese plant in Xiangxi, Hunan, containing: organic matter 1.9%, N 1.2%, P 1.0%, K 0.95%, Fe 7.5%, Mg 3.0%, Si 13.5% , Ca 12.3%, Mn1.1%, and the rest are elements such as C, O, S, Al, Se, Si and H.

[0030] Take 100 parts of manganese slag and 75 parts of ammonium carbonate, add them to 200 parts of saturated ammonium carbonate aqueous solution, react at 40°C for 30 minutes, and separate by filtration; filter residue with 5 parts of calcium lignosulfonate, 80 parts of urea, 75 parts Calcium phosphate and 36 parts of potassium chloride are mixed to obtain manganese fertilizer 1. After testing, manganese fertilizer 1 contains 16.8% of total nitrogen (N), available phosphorus (P 2 o 5 ) 4.2%, potassium oxide (K 2 O) 6.7%, total nutrient 27.7%.

[0031] Manganese fertilizer 1, manganese slag, ammonium carbonate, superphosphate and potassium chloride were applied...

Embodiment 2

[0033] Get 100 parts of manganese slag and 35 parts of potassium carbonate with the same ingredients as in Example 1, add them to 200 parts of saturated potassium carbonate aqueous solution, and stir and react at 35° C. for 1 hour; Calcium phosphate is mixed with 60 parts of urea to obtain manganese fertilizer 2. After testing, manganese fertilizer 2 contains 11.8% of total nitrogen (N), available phosphorus (P 2 o 5 ) 4.4%, potassium oxide (K 2 O) 10.5%, total nutrient 26.7%.

[0034] Manganese fertilizer 2 is applied to newly cultivated black locust seedlings in 3 times in 1 year by the consumption of 60, 120 and 180 kg / mu respectively. After 1 year, the average tree height of black locust is respectively 1.84, 1.95 and 2.26 meters, and the average diameter at breast height is respectively 0.81, 0.92 and 1.07 centimeters; the average tree height of black locust without fertilization is 1.01 meters, and the average diameter at breast height is 0.53 centimeters; mix potassi...

Embodiment 3

[0036]The manganese slag in this example is the leach slag obtained by reduction leaching of manganese oxide ore and Robinia pseudoacacia powder in Yongzhou, Hunan. For the reduction leaching method, see Example 1 of the patent application 201210042585.4. After leaching, it is washed with water and filtered. The filter residue contains: organic matter 9.2%, N 0.2%, P 0.2%, K 0.3%, Fe 9.0%, Mg 3.1%, Si 19.3%, Ca 8.6%, Mn 0.2%, and the rest are elements such as C, O, S, Al, Se, Si and H. Paper black liquor concentrate contains: lignin 26.18%, volatile acid 8%, other organic matter 36.15%, total alkali 25.8%, sodium sulfate 0.74%, silicon dioxide 0.22%, other inorganic matter 2.91%.

[0037] Take 100 parts of filter residue and 25 parts of potassium carbonate, add them to 200 parts of saturated potassium carbonate aqueous solution, react at 45 ° C for 1 hour, and filter and separate; filter residue with 5 parts of papermaking black liquor concentrate, 60 parts of superphosphate an...

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Abstract

The invention relates to a manganese residue compound fertilizer and a preparation method thereof. Manganese ore leached residue is used as the main raw material, a carbonate-containing fertilizer is added to convert calcium sulfate in the manganese residue into calcium carbonate, and the manganese residue compound fertilizer is prepared from the manganese residue containing the calcium carbonate, the lignin-containing additive, and one or more of nitrogen fertilizer, phosphate fertilizer and potash fertilizer. The carbonate-containing fertilizer and the lignin-containing additive can effectively prevent soil from packing together, keep the acid-base balance in soil, and enhance the fertilizer efficiency. The invention can effectively utilize abundant manganese residue generated in electrolytic manganese industry, and provides an effective way for recycling manganese residue.

Description

technical field [0001] The invention belongs to the field of fertilizer preparation, and mainly relates to a compound fertilizer made of manganese slag and a preparation method thereof. Background technique [0002] my country is the world's largest producer and consumer of electrolytic manganese. The annual production of electrolytic manganese has exceeded one million tons. For every ton of electrolytic manganese produced, about 5 to 8 tons of electrolytic manganese slag are produced. The annual production of electrolytic manganese slag in my country is Up to 5-8 million tons. At present, the storage of manganese slag not only consumes a large amount of land resources, but also the negative impact of lead, zinc, chromium and other heavy metals in manganese slag on the soil and water environment cannot be ignored. The development of comprehensive utilization technology of manganese slag is of great significance for turning waste into wealth and reducing the environmental haz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
Inventor 钟宏王帅蒋崇文刘广义曹占芳刘唐猛
Owner CENT SOUTH UNIV
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